Abstract
Dielectric barium strontium titanate (Ba0.5Sr 0.5TiO3 BST) thin films containing crystalline seeds of BST nanoparticles were prepared on indium titanium oxide (ITO) glass electrodes with a complex alkoxide precursor method. BST precursor solution that dispersed the BST particles was spin-coated on the electrode and annealed at various temperatures. Thickness of the film was about 300 nm and BST particle concentration in the film was varied from 0 to 17 mol%. An unseeded BST film was crystallized into a perovskite structure by annealing at 600°C while the seeding with the 17 mol%-BST particles promoted crystalline growth of BST perovskite and lowered crystallization temperature of the films to 525°C. Measurement of dielectric properties at 1 kHz showed that the 4.9 mol% BST-seeded film annealed at 600°C had a relative dielectric constant of 303 which was higher than that of the unseeded BST film.
Original language | English |
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Pages (from-to) | 315-321 |
Number of pages | 7 |
Journal | Journal of Sol-Gel Science and Technology |
Volume | 33 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2005 Mar 1 |
Keywords
- Barium strontium titanates
- Dielectric properties
- Films
- Sol-gel processes
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Chemistry(all)
- Biomaterials
- Condensed Matter Physics
- Materials Chemistry